Casing head



April 26, -19312.

G. A. HUMAsoN CAS I NG HEAD 'Filed Deo. 11, 1928 2 Sheets-Sheet April26, A1932.

G. A. HUMASON CASING HEAD Filed Dec. ll, 1928 2 Sheets-Sheet 2 PatentedApr. 1932 UNITED STATES PATENT OFFICE )GRANVILLE A. MASON, 0F HOUSTON,TEXAS, ASSIGNOB 0F ONE-HALF TO J'. A. LOGAN CASIN'G HEAD Appumion meaDecember n, 192s. serial m. 325,294.

This invention relates to new land useful improvements in a casing head.

One object of the invention is to provide a casing head adapted to besecured to the upper end of casing vin a well bore and formed to providean anchorage for the pump tubing in said casing as well as to form afluid tight seal between the tubing and casing.

. Another object of the invention is to provide, in a casing head, anovel type of tubing slip, or tubing holder which is formed to wedgearoundthe pump tubing to grip .and anchor said tubing against movementin the casing and to form a Huid tight joint between the tubing andowing, as well. l

A furtherv feature of the invention resides in the provision of a noveltype of tubing slip, having detachable means for handling the same.

With the above and other objects in View this invention has particularrelation to certain novel features of construction, operation andarrangement of parts an example of which is given Qin this specificationand illustrated in the accompanying` drawings wherein Figure i1 shows aside elevation of the casing head, vpartly in section.

Figure 2 shows a fragmentary vertical sectional view of a modified formthereof.

Figure 3 shows a horizontal sectional view of the tubing slip employed.

Figure 4 shows a side elevation thereof. IFigure 5 shows aside elevationof the derice partly in section, showing a modied form of tubing slipemployed.

Figure 6 shows a fragmentary vertical sectional view of said modifiedform of slip.

Figure 7 shows an upper end view of said form ofslip. f f

fFigure 8 shows a cross sectional View there o gigu're 9 shows a sideelevation thereof, au

Figure 10 shows a cross sectional view thereof, takenon the line 10--10of Figure 9. vReferring now more particularly to the drawings, whereinlike numerals of reference designates similar parts in each of thefigures the numeral 1 designates a casing set lower end has the internaldownwardly flared seat 8 and the external left hand threads 9 and thenipple is connected to the upper end of the body by the coupling 10. Thenipple has an internal annular shoulder 11 on which the packing 12 issea-ted which is held in position by the gland 13. This gland is held .5against the packing by means of a flange nut 14 which engages the outerend of the gland and is screwed onto the upper end of said nipple 7. Thepacking 12 forms a fluid tight joint between the nipple 7 andthe pump ntubing ,15.

rlhere is a tubing slip formed of the jaws 16. These jaws are hingedtogetherA except atV one side of the slip, and the lower and upper endsof the slip are tapered to -con form to the contour of and lit withinthe respective seats' 5 and 8. At the onen side of the slip there arethe handles 17,17, screwed into the free ends of the corresponding jawsand by means of which the slip may be han- 50 dled, The inner surfacesof the jaws are toothed, the teeth at the lower ends being upwardlyinclined to engage the tubing and hold it against downward movement, andthe teeth at the upper ends of the jaws are 35 downwardly pitched so asto engage and hold the tubing against upward movement.

In the form shown in Figure 2, a packing ring, as 18, may be insertedbetween the adjacent ends of the body 2 and nipple 7 said 90 ring beingformed of suitable packing mate rial and being provided with seats whichare `formed to fit closely against the corresponding ends of the tubingslip.

In the form shown in Figure 5 the upper 95 ends of the slip jaws 16 areprovided withsuitable packing 19 which closely surrounds the tubing 15and forms a tightjoint therewith so that the packing 12, the gland 13and the clamp nut 14, shown in Figure 1 may be 100 dispensed with inthis form. The coupling 10 may be provided with suitable handles orgrips 20, by means of which the coupling may be turned.

In each form the slip may be tightened into clamping relation about thetubing 15 by turning the coupling 10 to the right.

In assembling the device when the tubing has been lowered to the desiredpoint, in the casing the handles 17 may be screwed into the socketsprovided for them in the slip and the slip then seated in the flaredseat at the upper end of the body around the tubin and the handles thenunscrewed and remove The coupling 10 may then be screwed onto the upperend of the body, 2, or 2, as the case may be, and the nipple with theassociated packing 12, if the packing be necessary,

.then assembled in position and the coupling then appropriately turnedto tighten the slips against the tubing.

The forms shown are for the purposes of illustration and changes indesign and me-` chanical construction may be made and equiv alentssubstituted for the parts shown within the principle of the invention.

1. A casing head including a coupling tubular members whose adjacentends are connected by said coupling said connected ends being formedeach with an internal flared seat, a tubing slip whose ends are taperedand seated in said respective seats said slip being adapted to engageand support a,- tubing suspended in a well and including an annularpacking between said tubing and one of said couplings.

2. A head for a well casing including a coupling, tubular members whoseadjacent ends each have an internal liared seatland are connected tothecoupling by right and left hand threads, respectively, and Iare spacedapart, a vtubing slip -whose ends are tapered and seated in saidrespective seats, said slips being formed of sections, hinges connectingsaid sections and arranged between said tubular members. y

3. A head for a well casing including a coupling, tubular members whoseadjacent dends are connected by said coupling, said connected ends beingformed each with an internal flared seat, a tubing slip whose ends aretapered and seated throughout their assasso 5. A head for a well casingincluding two tubular members, a tubular coupling connecting saidmembers, a tubing holder arranged within saidl coupling, said membersbeing provided with confronting flared seats, and the ends of saidholder being tapered and fitted throughout their tapered( areas into threspective seats.

6. A casing including two tubular members, a tubular coupling connectingsaid members, a tubing holder arranged within said coupling, saidmembers being provided with confrontlng flared seats, and the ends ofsaid holder being tapered and fitted into the respective seats, means inthe holder for engaging a tubing therein to prevent the upward ordownward movement of the tubing and annular packing means incorporatedinto said holder and forming a fluid tight joint between the tubing andone of the coupling members.

7 A casing headv includingl a tubular body whose upper end is upwardlyflared forming an internal flared seat, a tubular nipplev whose lowerend is downwardly ilared forming an internal flared seat, a tubularcouplin threaded onto the upper end of said body an the lower end ofsaid nipple, a tubing slip whose upper and lower ends are tapered toconform to the taper of and'to fit Within said respective seats, aninternal annular seat in GRANVILLE A. HUMASON.

tapered areas in said respective 4seatssaid slip being formed of jawshinged together,

and being open at one side.

4. A head for a well casing including tubular members whose confrontingends are spaced apart and provided each with an internal scat, acoupling connecting said members by means of right. and left handthreads, respectively, a tubing holder formed of jaws and whose ends areseated in said respective seats, hinges connecting said jaws and locatedin the space between said tubular members.

